Notepad++ is a free source code editor which supports several programming languages running under the Microsoft Windows environment.

This project, based on the Scintilla editor component, is written in C++ with pure Win32 API calls and uses STL. It is under the GPL License. The aim of Notepad++ is to offer a slim and efficient binary with a totally customizable GUI.

It supports auto-completion, regular expression find and replace, split screen editing, zooming, bookmarks, and brace and indent highlighting. It has support for macros and plug-ins. A user-written plug-in called TextFX, which provides many text transformation options, is included by default.